Full Service Dentistry for the Whole Family

At First Impressions Dental, Dr. Terry Trezek takes pride in offering a wide range of services that cater to all your oral health needs. We are always happy to help you achieve a healthy and beautiful smile.

Full Service Dentistry for the Whole Family

Years of Experience

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Patient Satisfaction

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5 Star Reviews!

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Meet The Doctor

Terry Trezek, D.M.D.

Dr. Terry Trezek received his bachelor’s degree from Southern Illinois University. He obtained his Doctor of Dental Medicine degree in 2000 from Southern Illinois University’s School of Dental Medicine. Dr. Trezek is a proud member of the International Association of Orthodontics, the International Congress of Implantologists, and the American Academy of Craniofacial Pain. He is a certified Invisalign provider and is active in various local, state and national dental organizations. Dr. Trezek continues to advance his education in dentistry by completing continued education coursework yearly and reinvesting in the latest technology to provide the best care possible.

First Impressions Dental is one of few offices in the St. Charles County area to participate in the Pay It Forward Foster Care Program which helps children in the foster care system receive access to dental care services.

Our Services

From routine cleanings and exams to advanced treatments such as implants and cosmetic procedures, we strive to meet the diverse needs of our patients.

We are so excited to let you know that we have an in-office laboratory at First Impressions Dental! This means that we can offer you same-day crowns and bridges, which is super convenient for busy schedules. We're always looking for ways to make your experience with us as comfortable and efficient as possible.

Read What Patients Are Saying About Us!

If we’ve been fortunate enough to serve you at our location, why not share your own experiences? You can leave your testimonial on Google.

O'Fallon, MO

Troy, MO

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Dr. T is very polite and kind! I have been going to this office for a couple years now. He stays on top of issues and quick to see you if you have an emergency situation.

⭐ ⭐ ⭐ ⭐ ⭐
Best dentist ever. Have been going here for over 12 years & will never switch! Highly recommend.

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I never liked going to the dentist that is until I started going to first impressions dental. Everyone is nice and friendly I look forward to my dentist visits now.

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We absolutely love Dr. Trezek and his staff! He is fantastic with the kids and concise with treatment plans. The O’Fallon office is bigger but either office, I know my kiddos are in great hands!

O'Fallon, MO

Troy, MO

How Can We Help

Our mission is to offer exceptional dental care without causing any inconvenience to our patients. We have two readily accessible locations, so you can expect prompt and personalized services tailored to meet your needs efficiently.

Our approach is aimed at building a solid relationship with our patients through proactive communication channels that ensure every individual receives individualized attention.

Patient Portal

Set up your patient portal to get valuable information at your fingertips.

Patient Portal

Are you a new patient?

Complete our new patient registration forms to get a head start.

Learn More

Post-Op Instructions

We’ve got you covered with some instructions to help you with your post-operative care. These tips will ensure that you have a speedy and comfortable recovery. Click on the link below to access the post-operative instructions.

Post-Op Instructions

Full Service Dentistry for the Whole Family